Qt 6.5.3 : Can't change QWidget position

paulo95

Hello everyone.

I have problem with my QWidget window which I can't update position.
I don't use the Ui tool.

(aw_ is a QWidget)

I've tried:

QRect           screenGeometry;
int             x;
int             y;

screenGeometry = QApplication::primaryScreen()->geometry();
x = (screenGeometry.width() - aw_.width()) / 2;
y = (screenGeometry.height() - aw_.height()) / 2;
aw_.move(x, y);
aw_.show();

but the window doesn't move.

I also tried :

QRect           screenGeometry;
int             x;
int             y;

screenGeometry = QApplication::primaryScreen()->geometry();
x = screenGeometry.center().x();
y = screenGeometry.center().y();
aw_.setUpdatesEnabled(true);
aw_.setGeometry(x, y, 400, 300);
QApplication::processEvents();
aw_.show();

There the size of the window changed but remains stuck a random point on the screen.

I also tried to create a new project with a Ui and I saw in the Design panel that the values of X and Y of the geometry property can't be changed (they're disabled) but not width and height.

Does anyone has an idea?

Thanks in advance.

JoeCFD

@paulo95 OS?

paulo95

Debian 12

JonB

@paulo95
If/assuming you are running under Wayland you will find you can do little to position windows. Several threads in this forum to that effect. Use Xorg if you must do so.

paulo95

@JonB

Thanks for you answer.
Yes I'm under Wayland.
Already had problem with it : had marshal_proxy_plugin error when running empty QtWidget Application under Debian 11. Had to migrate to Debian 12 to have recent version of libwayland.

Currently switching to Xorg at login screen makes me gray screen.
I'm keeping you posted when solved this and tried.

paulo95

@JonB
@JoeCFD

OK found that Wayland just doesn't allow to windows to move themselves.

Not a necessary feature for me and can't solve the black screen problem when logging with Xorg.
Will just ask gnome to center new windows with tweaks.

Closing the topic.

Thanks to both you.